Cisco NX-OS 6.2.8 HSRP improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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5.0$5k-$25k0.00

Summaryinfo

A vulnerability was found in Cisco NX-OS 6.2.8. It has been rated as problematic. Affected is an unknown function of the component HSRP Handler. This manipulation causes improper authentication. This vulnerability appears as CVE-2014-3295. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic was found in Cisco NX-OS 6.2.8 (Router Operating System). Affected by this vulnerability is an unknown function of the component HSRP Handler. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect integrity, and availability. The summary by CVE is:

The HSRP implementation in Cisco NX-OS 6.2(2a) and earlier allows remote attackers to bypass authentication and cause a denial of service (group-member state modification and traffic blackholing) via malformed HSRP packets, aka Bug ID CSCup11309.

The weakness was presented 06/10/2014 with Cisco as CSCup11309 as confirmed security notice (Website). The advisory is shared at tools.cisco.com. This vulnerability is known as CVE-2014-3295 since 05/07/2014. The exploitation appears to be easy. The attack needs to approached within the local network. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 06/22/2021). The advisory points out:

Cisco NX-OS devices configured for TEXT or MD5 group authentication will accept malformed HSRP packets leading to bypass of authentication. A potential attacker can affect the state of HSRP group members, causing them to release ACTIVE/STANDBY roles and go back to SPEAK state.

The vulnerability scanner Nessus provides a plugin with the ID 83904 , which helps to determine the existence of the flaw in a target environment. It is .

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (93734), Tenable (83904), SecurityFocus (BID 67983†), Secunia (SA59158†) and SecurityTracker (ID 1030409†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.4
VulDB Temp Score: 5.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 83904
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Port: 🔍

OpenVAS ID: 103402
OpenVAS Name: Cisco NX-OS Software HSRP Authentication Denial of Service Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/07/2014 🔍
06/10/2014 +34 days 🔍
06/10/2014 +0 days 🔍
06/10/2014 +0 days 🔍
06/11/2014 +1 days 🔍
06/12/2014 +1 days 🔍
06/12/2014 +0 days 🔍
06/14/2014 +2 days 🔍
07/13/2014 +29 days 🔍
05/30/2015 +321 days 🔍
06/22/2021 +2215 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: CSCup11309
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-3295 (🔍)
GCVE (CVE): GCVE-0-2014-3295
GCVE (VulDB): GCVE-100-13573
X-Force: 93734 - Cisco NX-OS HSRP denial of service, Medium Risk
SecurityFocus: 67983 - Cisco NX-OS Software HSRP Packet Parsing Denial of Service Vulnerability
Secunia: 59158 - Cisco NX-OS HSRP Packet Handling Denial of Service Vulnerability, Less Critical
SecurityTracker: 1030409 - Cisco NX-OS HSRP Processing Flaw Lets Remote Users Deny Service
Vulnerability Center: 45359 - Cisco NX-OS Remote DoS via Malformed HSRP Packets, Medium

Entryinfo

Created: 06/12/2014 13:01
Updated: 06/22/2021 19:09
Changes: 06/12/2014 13:01 (78), 06/01/2017 16:04 (5), 06/22/2021 19:09 (3)
Complete: 🔍
Cache ID: 216::103

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